JP2889358B2 - Three-way valve housing structure - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a housing structure of a three-way valve for switching a fluid path by reciprocating a valve body by an electromagnetic force of a solenoid and a spring.

2. Description of the Related Art Conventionally, there is a three-way valve shown in FIG. 3 used for a hydraulic circuit such as an automatic transmission of an automobile.

That is, the three-way valve 31 includes the housing 32 and the housing 32.
The solenoid 33 includes a solenoid 33 fixed to the solenoid 32. The solenoid 33 includes a solenoid main body 36 including a coil 34 and a bobbin 35, and a core 37 fitted in the solenoid main body 36. The housing 32 has an inflow hole 38 and a first
Outflow hole 39 and a second outflow hole 40 are provided, and a valve chamber 41 communicating the holes 38, 39, and 40 is further provided. The valve chamber
Inside the 41, a tapered first valve seat 42 is formed, and a guide member 44 formed with a second valve seat 43 opposed to the first valve seat 42 is fitted therein. Further, the first
A ball 45, which is a spherical valve body, is movably sealed between the valve seat 42 and the second valve seat 43.

A plunger 46, which is an armature, is slidably fitted inside the housing 32, and a push rod 47 is extended at one end in the sliding direction. The portion is in contact with the ball 45 in the valve chamber 41. In addition, the plunger 46
A spring 48 is fitted inside the other end in the sliding direction. The plunger 46 is urged to be separated from the core 37 by the spring 48, and the push rod 47
Urges the ball 45 to be seated on the first valve seat 41, and the inflow hole 38 is closed.

In the three-way valve 31, the solenoid 33 and a yoke 49 provided between the solenoid 33 and the housing 32 are provided.
And the plunger 46 form a magnetic circuit. Therefore, when the plunger 46 is slid by the electromagnetic force of the solenoid 33, the ball 45 sits on the second valve seat 43, closes the second outflow hole 40, and closes the inflow hole. Release 38. That is, the three-way valve
Numeral 31 is a normally closed type (hereinafter referred to as N / C type) in which the inflow hole 38 is closed when the solenoid 33 is not excited.

On the other hand, the one shown in FIG. 4 uses the three-way valve 31 as a normally open type (hereinafter, N / O type) in which the inflow hole 38 is opened when the solenoid 33 is in a non-excited state.
This is a design change. That is, N / O type three-way valve 5
Inside the inflow hole 38 formed in the housing 52, a return spring 53 is fitted and supported, and a valve chamber 57 is formed by a seat member 55 in which a tapered first valve seat 54 is formed. Have been. The seat member 55 has a second valve seat 56 on the back surface opposite to the first valve seat 54.
Are formed. A ball 45 supported by the return spring 53 is movably sealed in the valve chamber 57.

A guide member 58 is provided inside the housing 52, and an armature plunger 59 is slidably fitted in the housing 52. A push rod 60 extends from one end of the plunger 59 in the sliding direction, and a root portion of the push rod 60 is a second valve seat of the seat member 55.
At 56, the second outlet hole 40 is closed. Further, the push rod 60 is loosely fitted to the seat member 55, and the tip end of the push rod 60 comes into contact with the ball 45 in the valve chamber 57 so as to separate the ball 45 from the first valve seat 54. Thus, the inflow hole 38 is opened.

Hereinafter, the N / O type three-way valve 51 has substantially the same configuration as the N / C type three-way valve 31 described above. In the above configuration, the solenoid 33, a yoke 49 provided between the solenoid 33 and the housing 52, and the plunger
57 constitutes a magnetic circuit. And the N /
In the O-type three-way valve 51, when the solenoid 33 is excited, the plunger 57 is attracted to the core 37 to open the second outflow hole 40, and the ball 45 is connected to the first valve seat.
The inflow hole 38 is closed by sitting on 54.

[Problem to be solved by the invention] However, in such a conventional three-way valve,
When the N / O type three-way valve 31 (FIG. 3) is replaced with the N / C type three-way valve 51 (FIG. 4), new members such as the above-described return spring 53 and seat member 55 are required. Becomes Further, the housing 52, the plunger 57, and the guide member 58 need to be formed in different shapes, and these cannot be shared by both the N / O type and the N / C type three-way valves. Therefore, when two types of three-way valves, an N / O type and an N / C type, are manufactured, there is a problem that the manufacturing cost is increased.

The present invention has been made in view of such a conventional problem, and two types of N / O type and N / C type are provided by a simple design change of one three-way valve at a low cost. It is an object of the present invention to provide a three-way valve housing structure that can be used as a three-way valve.

[Means for Solving the Problems] In order to solve the problems, according to the present invention, a housing having three flow ports and two valve portions is reciprocated by an electromagnetic force of a solenoid and a spring. A valve body is fitted therein, a magnetic circuit is formed by the solenoid, the housing, and the valve body, and the two valve portions are alternately opened and closed by the reciprocating operation of the valve body, and a fluid path inside the housing is formed. In the switching three-way valve, the housing includes a housing body having one valve portion and an opening, and a closing member having one valve portion and closing the opening of the housing. One of the members was formed of a magnetic material, and the other was formed of a non-magnetic material.

[Operation] In the above-described configuration, when the housing body that forms the housing is formed of a magnetic material, and the closing member that closes the opening of the housing is formed of a non-magnetic material, the three-way valve is formed. Is constituted by the solenoid, the housing main body, and the valve body. Therefore, when the solenoid is excited, the valve body is attracted to the housing main body and closes the valve section of the housing main body. On the other hand, when the housing main body is formed of a non-magnetic material and the closing member is formed of a magnetic material, the magnetic circuit of the three-way valve includes the solenoid main body, the closing member, and the valve. Therefore, when the solenoid is excited, the valve body is attracted to the closing member and closes the valve portion of the closing member.

That is, when changing the valve portion that is opened or closed when the solenoid is excited from one of the two valve portions to the other, the material of the housing main body and the closing member is made of a non-magnetic material. The change can be made by reversing the magnetic material or the non-magnetic material and the magnetic material. Therefore, even if the change is made, the number of components does not increase. Further, the components other than the housing body and the closing member do not need to change their shapes even when the magnetic circuit configuration described above is changed.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. That is, FIG. 1 shows the N / C according to the first embodiment of the present invention.
This figure shows a three-way valve of the type, and an N / C type three-way valve 1 has a housing 2 and a solenoid 3 fixed to the housing 2. The solenoid 3 is composed of a solenoid body 6 composed of a coil 4 and a bobbin 5, a yoke 7 fixed inside the solenoid body 6, and the like. 2 and fixed. A recess 9 is provided at the center of the end of the yoke 7 located on the housing 2 side.

The housing 2 includes a housing body 10 made of a non-magnetic material having an opening on the solenoid 3 side, and a seat plate 11 made of a magnetic material serving as a closing member fixed to close the opening of the housing body 10. It is composed of
The housing body 10 is provided with an inflow hole 12 and a first outflow hole 13 which are flow ports, and the sheet plate 11 is provided with a second outflow hole 14 which is a flow port. Note that, inside the housing 2, an opening 23 of the inflow hole 12 and an opening 24 of the second outflow hole 14 form a valve portion.

A guide part 15 fixed by caulking after being press-fitted into the housing body 10 is provided inside the housing 2 and a plunger 16 made of a magnetic material serving as a valve body is provided.
Are slidably fitted outside. The plunger 16 has a hollow inside, and a large-diameter portion 17 fitted with the guide portion 15,
It has a small-diameter portion 18 connected to the large-diameter portion 17 and loosely inserted into the second outflow hole 14. A step 19 is provided on the outer peripheral surface of the plunger 16 at a position where the large-diameter portion 17 and the small-diameter portion 18 are connected, and the step 19 has a pressure receiving surface 20 and the sheet plate. 8, a sheet surface 21 is formed.

On the other hand, the small diameter portion 18 loosely inserted into the second outflow hole 14
The open end of the small diameter portion 18 is loosely fitted in the concave portion 9 of the yoke 7, and a spring 22 is internally fitted in the open end of the small diameter portion 18. The plunger 16 is urged by the spring 22 to close the opening 23 of the inflow hole 12 and open the second outflow hole 14.

In the N / C type three-way valve 1 having the above configuration, the solenoid 3, the seat plate 11, and the plunger
16 constitutes a magnetic circuit. Therefore, when the solenoid 3 is excited, the plunger 16 is attracted to the sheet plate 11 and slides, whereby the opening 23 of the inflow hole 12 is opened, and the seat of the plunger 16 is opened. The surface 21 corresponds to the opening 24 of the second outflow hole 14.
To close. Therefore, the fluid path inside the housing 2 is switched.

On the other hand, FIG. 4 shows a second embodiment of the present invention, in which the aforementioned N / C type three-way valve 1 is changed to an N / O type. That is, the N / O type three-way valve 25 is the N / C type three-way valve 1 described above.
And the housing main body 10 in the N / C type three-way valve 1 is formed of a magnetic material,
The sheet plate 11 is formed of a non-magnetic material. The guide portion 15 of the housing body 10 has a concave portion 26.
And the spring 22 is fitted in the recess 26. The plunger 16 is connected to the spring 22
And the second outlet hole is urged by the sheet surface 21.
The opening 24 of 14 is closed, and the opening 23 of the inflow hole 12 is opened. In addition, the other configuration is N /
The description is omitted because it is the same as the C-type three-way valve 1.

In the N / O type three-way valve 25 having such a configuration, the solenoid 3, the housing body 10, and the plunger
16 constitutes a magnetic circuit. For this reason, when the solenoid 3 is excited, the plunger 16 is attracted to the housing body 10 and slides.
12 opening 23 is closed and said second outlet hole
The 14 openings 24 are opened. Therefore, the fluid path inside the housing 2 is switched.

As is clear from the first embodiment and the second embodiment, according to the present invention, the N / C type three-way valve 1 is replaced by the N / O type three-way valve 1.
When the housing body 10 is changed from a non-magnetic material to a magnetic material, and when the seat plate 11 is changed from a magnetic material to a non-magnetic material, the number of parts constituting the three-way valve is changed. The change can be made without increasing. Further, the solenoid 3 and the plunger 16 do not change in shape, and the N / C type three-way valve 1 and the N
It can be shared with both the / O type three-way valve 25. Therefore, one three-way valve can be made into two types of three-way valves of the N / O type and the N / C type at a very low cost by a simple design change.

[Effects of the Invention] As described above, in the present invention, a valve body reciprocatingly slid by the electromagnetic force of a solenoid and a spring is fitted in a housing having three communication ports and two valve portions. In a three-way valve that forms a magnetic circuit by the housing and the valve body, the housing has a housing body having one valve portion and an opening, and has a valve portion and closes an opening of the housing. A three-way valve housing structure in which one of the housing body and the closing member is formed of a magnetic material and the other is formed of a non-magnetic material.

Therefore, when changing the valve portion opened or closed by the valve body when the solenoid is excited from one of the two valve portions to the other, the material of the housing body and the closing member is changed. The above-mentioned change can be made by reversing a magnetic material and a non-magnetic material or a non-magnetic material and a magnetic material. For this reason, even if the change is performed, the number of parts of the three-way valve does not increase, and further, the parts other than the housing body and the closing member can be used as they are regardless of the above-described change. .

Therefore, one three-way valve can be made into two types of three-way valves by a simple design change and at extremely low cost.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an N / C type three-way valve showing a first embodiment of the present invention. FIG. 2 is a cross-sectional view of an N / O type three-way valve showing a second embodiment of the present invention. FIG. 3 is a cross-sectional view of an N / C type three-way valve in a conventional example, and FIG. 4 is a cross-sectional view of an N / O type three-way valve in a conventional example. 2 ... housing, 3 ... solenoid, 10 ... housing body, 11 ... sheet plate (closing member), 12 ... inflow hole (flow port), 13 ... first outflow hole (flow port), 14 …
... Second outlet hole (distribution port), 16 plunger (valve element), 22 spring, 23 opening part (valve part) of inlet hole 12, 24 opening part of second outlet hole 14 Part (valve part).

Claims (1)

(57) [Claims] 1. A housing having three communication ports and two valve portions is fitted with a valve body that reciprocates and slides by an electromagnetic force of a solenoid and a spring, and is formed by the solenoid, the housing, and the valve body. In a three-way valve in which a magnetic circuit is configured to alternately open and close the two valve portions by reciprocating operation of the valve body and switch a fluid path inside the housing, the housing includes one valve portion and an opening. And a closing member having one valve portion and closing the opening of the housing. One of the housing body and the closing member is formed of a magnetic material, and the other is formed of a non-magnetic material. A three-way valve housing structure.